817419c99ed6c07c846453a45603d1854cc03d979ac0f6d87a7f2705a683a51e

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:31

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General

Target

2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe
Size

96KB
MD5

4a5b0e414f3f6a587cf94d91c7ec4d76
SHA1

91250a97edd84196cf152474db237f768f75555c
SHA256

817419c99ed6c07c846453a45603d1854cc03d979ac0f6d87a7f2705a683a51e
SHA512

326fcdcbaa34238c37a665d4606c1a3d2e906b0a49af3eecbdc0ba28413971628259e5b5726719cb5473f03a0acc39ac4f3c2f7876a71c9390d5d158880d5e55
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwNgpT:V6a+pOtEvwDpjtzo

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

224 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
224	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe

description	pid	process	target process
PID 1072 wrote to memory of 224	1072	2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe	asih.exe
PID 1072 wrote to memory of 224	1072	2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe	asih.exe
PID 1072 wrote to memory of 224	1072	2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_4a5b0e414f3f6a587cf94d91c7ec4d76_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1072

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:224

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
97KB

MD5
ef9c10481fa7f7163c0d8c9be140e7f0

SHA1
308c66343b9754f0a7873a9b8f65cc179e8bf7f0

SHA256
14d63044c04bea7c211684244e3e059a2b679f53789e3c83e6877533734721bb

SHA512
33a3205a5ebbff9fc7c165a4e3bed27f3c7a3df6af304c4f3aa15211b94bf483abf59cd4e494fde502cc0c1b6e280429b9d5b34c8531a14652bab985cc2c9aa4

Download Submit
memory/224-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/224-23-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1072-0-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1072-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1072-8-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download